21020112110233 has 8 divisors (see below), whose sum is σ = 21937376694600. Its totient is φ = 20115676401408.

The previous prime is 21020112110213. The next prime is 21020112110243. The reversal of 21020112110233 is 33201121102012.

It can be written as a sum of positive squares in 4 ways, for example, as 2506686895504 + 18513425214729 = 1583252^2 + 4302723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020112110233 - 2³³ = 21011522175641 is a prime.

It is a super-2 number, since 2×21020112110233² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21020112110233.

It is not an unprimeable number, because it can be changed into a prime (21020112110203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3207215538 + ... + 3207222091.

It is an arithmetic number, because the mean of its divisors is an integer number (2742172086825).

Almost surely, 2^{21020112110233} is an apocalyptic number.

It is an amenable number.

21020112110233 is a deficient number, since it is larger than the sum of its proper divisors (917264584367).

21020112110233 is a wasteful number, since it uses less digits than its factorization.

21020112110233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414437771.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21020112110233 its reverse (33201121102012), we get a palindrome (54221233212245).

The spelling of 21020112110233 in words is "twenty-one trillion, twenty billion, one hundred twelve million, one hundred ten thousand, two hundred thirty-three".